Air-moistener for hct-air furnaces



B. A. MUELLER.

` AIR MOISTENER FOR HOT AIR FURNACES. APPLICATIUN FILED AUG.23| 1919. RENEWED MAY 26, 1921.

1,384, 33 1 Patented July 12, 1921.

I .1. .ZJ I ,3. f 131 mqgmmq@ "Z-g and UNITED s'rArss PATENT OFFICE.

BERNHARD n. Mosman, or nasa" sr. Louis, irmrnors.

` nin-Morsmnnnn son nor-AIR annuliens.

Specicaten of Letters Patent. Patented July 12, 1921,

Application filed August 23, 1919, Serial No. 319,425. Renewed.VIVEN/'75.126,` 1921. Serial No. 472,886.4

tcners .for Hot-Air Furnaces, of which theY following is a specitication. j My invention relates to air moisteners for not an` furnaces.

'he object of the invention is to provide a` readily attachable air moistener for hot air furnaces in which the supply of water to the hot air chamber at thetop of the furnace casing will be automatically controlled Aby a controller actuated by changes in condition ofthe air in the casing. A further object` 1 is to provide a controller in the form of a sectional bar builtof sections of wood secured together' crosswise oi the grain.

rlhese objects l accomplish by the con-- struction shownin the accompanying drawing, in which: j

lfigure 1 is a perspective partly in section Lof a hot air furnace with my improved air inoistener applied. j

Fig. 2 is an enlarged detail perspective,

y f Fig. 3 is a sectional plan view of the valve.

The furnaceis'iprovided with the usual outer casing v1 at the'topof 'which is the hot air chamber 2.` 1

The Acasing 1 is provided just below the hot airchamber 2 with an` opening 3 formed by punching in a tongue l which inclines inwardly and upwardly and a similarly formed opening 5 is formed some distance below the opening 3, the tongue 6 of which incl ines downwardly and inwardly, as clearly shown in Fig. 2. These two openings 3 and 5 are connected by a flue in the form of a tube 7 open at one side and there provided with attaching flanges 8 riveted' or otherwise secured to the furnace casing. The to and bottom ends of the tube 7 -are closer,`

as shown at 8 and 9, so that the hot air between the casing and `re box will be directed by the lower tongue 6 into the tube or flue 7 and when it reaches the upper opening it will be directed by the upper tongue Ll into the hot air chamber 2. This arrange ment causes a draft of hot air through the tube.

Within the flue or tube 7 there is placed a longitudinally expansible and contractible bar 10, shown in the present instance as in the closedupper end of said tube 7.

`iwater supply in any desiredmanner.

formed of blocks of `wood 11, arranged crosswise of the grain. rFhesebloclrs' of wood 11 i are of cross grained woodwith the grain of one block crosswise ofthe other to prevent warping ofthe bar and the blocks are secured together in any desired manner, as by staples 12. Y l

VThe bar 10 thus formed is secured at its lower end to the bottom of tube 7, and at its secured between its endsto the threaded" stem 16 cfa needle valve 17 ymounted `in the valve casing 15.' i This 4connection is made by means of a short chain 19 extending from the rod 1Bto ja nut 20l mounted adjustably on.Y threaded arml 15 so that by adjusting the. i

nutithe arm 15 may bemade to `open the valve to the desired extent. Thek opposite end of the arr/n 15^- is provided with an adjustable weight 21 also threaded on arm 15 and adapted to close the valve.v Avery nice adjustment` ofthe valve is thus provided. The valve casing 18-isconnectedwith the As shown inthe (drawing,` the valve casing is connected` by a pipe 25` with the hot watery,

pipe 26 leading from a coil, not shown, in the furnacelire box to a domestic boiler, also not shown, but well known.

rIhe valve casing 18 is further provided with a discharge nipple 27 kat one side under which is placeda trough 29 extending thence through an aperture 30 in the hot air chamber, where it discharges preferably into an open pan or tray 31.

` lt will be seen that a draft of hot air will pass upwardly through flue or tube 7 and when the air is too dry the hygrometric bar l0 will contract longitudinally and so pull down on rod 13, which in turn will rotate needle valve against the action of its closing element and so permit water to discharge into the trough 29. As soon as the condi-` tion of the air changes by reason of added moisture the bar 7 will expand and so allow the needle valve to be closed by its weight.

. Any form of valve may be employed, how-` ever, capable of being opened and closed by the bar.v It is manifest that the tube 7 may i casing, if so desired, and that other forms Y of atmospherically contractible and expansible rods or bars may be employed.

What I claim is:

l. An Iair moistener for hot air furnaces comprising a tube'adapted to be secured to a furnace casing and form a hot air flue, `an atmospherically contractible and expansible 'rod locatedy in said tube, and provided with a valve actuating'V rod at its upper end, a 'valve `actuated by said rod, and ymeans for conducting` the water discharged from thev valve into the hot 'air chamber of a furnace. y Y 2'. The combination with a hot air furnace having upper and lower openings in 1 one side, of'a 'tube or Hue secured to the side of Y hot air chamber. 1

3, The combination with ya hot air furnace Y the casingV and communicating at its upper and lower portions with said openings, an

zatrnosp'herically `controlled barV within saidV tuberor flue and secured at its lower end to the bottom ofthe flue, a rodiextending from the bar through the top ofthe iiue or tube, a

kwater supplyvalveto which the upper end ofthe rodis connected,and atrough leading from'the discharge side of the valve into the `provided with upperand lower openings in fits.@single-downwardly and inwardly in-V clinedton'gue at the upper edge ofthe lower opening, andan upwardly fand inwardly 1n i p clined tongue at the lower edge of the upper opening, of -a tube closed at its ends, secured x tothe outer side ofthe casing-and communicating with saidk two casing openings, an atmospherically control-led, longitudinally contractible'an'dzexpansible barsecured at its Y' loweren d vwithinthe tube and provided with ma rodv extending throughtheclosed upper Y 40 end ofsaid tube, and `al water supply valve controlled by said bar and rodfand'discharg ing intro the hot'air chamber of the furnace.

4r. T he combination with a hot air furnace provided with upper and lower openings in the side of thecasing, a tube closed at its ends and communicating with said openings, an atmospherically controlled barjformed of a series of cross grained wooden blocks secured together to form arigid compound element and xedly secured at its lower end to the bottom of thetube, a water supply vided at its upper end with 'a rod extending through the upper endof said tube, a water supply valve provided with an offtake leading into the hotzair furnaceand having au actuating arm, yand means for adjustably Y (connecting thefupperend of Athe rod with said operating arm.

6. `An air moisteningl attachment for hot airfurnaces comprising a 'tube adapted for j attachment to .a furnace casing to form a hot airiiuefan :atmospherically controlled bar secured at its lower end within the tube orflue. and having a valve operating-rod eX- tendinglthroughthe upper end thereof, a water supply needle valve Y.for the hot air i chamber, provided with a horizontal threaded arm, an adjustable nut` on one end of the arm to `whichlthe upperfend of said'rod is connected, anda weight adjustable on the other end ofI said ithreaded valve arm.

ln testimony whereof l aiiix my signature.

BERNHARD A. MUELLER. 

